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What is firepolishing?

Firepolishing is the process of heating a glass object in a kiln to a temperature high enough to impart some level of gloss to the surface. Related Questions What temperature should I use for firepolishingHow can I cast to get some read more

What is devitrification or "devit"?

Devitrification ("devit") is the growth of crystalline structures within or on the surface of glass. ("Vitri" = glass; "devitrification" = the process of becoming un-glasslike). Devit can result from firing too slowly through the devitrification read more

What is annealing? Why is it necessary?

One of the most distinctive physical properties of glass is how it reacts to temperature variation.  When it heats it expands; and as it cools it contracts.  These processes create stresses within the glass especially between the read more

How do I restrain glass flow?

Restraining glass flow requires the use of kiln furniture such as side walls and dams.  In Tipsheet 3 Working Deep and TipSheet 5 Bullseye Box Casting we discuss the fundamentals of using these tools in the context of specific kilnforming read more

How do I program a Paragon kiln to go as fast as possible?

Paragon kilns are great kilns for the home studio or workshop.  We recommend them for their high quality and ease of use. In order to get a Paragon kiln to heat or cool as quickly as possible simply enter the rate 9999°F. Related read more

How do I prevent glass from sticking to kiln shelves?

Hot glass will adhere to kiln shelves if not prevented by a separator. For most basic kilnforming projects Bullseye Shelf Primer is an ideal separator. It's affordable highly effective and easy to use. See Using Bullseye Shelf Primer read more

How do I make a desktop?

Making a glass desktop can be a complex project requiring a fair amount of experience and specialized equipment. If you're serious about making a desktop we recommend that you take basic kilnforming classes to learn about the tools and read more

How do I know whether to use Standard 3 mm glass or Thin (2 mm) glass?

Consider the 6-millimeter rule When heated to full fusing temperatures most Bullseye sheets will naturally assume a thickness of about 6 millimeters unless constrained by dams or molds. For projects like plates and tiles you may want read more

Do you have projects that teach about kiln forming?

Yes we have several projects with step-by-step instructions to teach you a variety of different kiln forming methods. If you haven't already consider subscribing to Bullseye Videos. These video lessons are the next best thing read more

Can I make my own stringers?

Yes you can hand-pull your own stringers using a Vitrigraph kiln. If you have the opportunity to use a Vitrigraph kiln we highly recommend you take it. Not only is it fun but you will be able to make unusually shaped stringers that can read more

ZYP Tips

Download the ZYP Tips for Ceramic Casting Molds PDF ZYP Boron Nitride Aerosol Lubricoat (8714) is a separator that can be applied to ceramic casting molds as a release between the mold and glass. It can be very effective and…

Bullseye Investment Mixing Instructions

Download the Bullseye Investment Mixing Instructions PDF Safety First Mix in a well-ventilated area while wearing a NIOSH-approved respirator. Mixing Steps Determine how much investment material you will need for your…

Bubble Population

Download the Bubble Population PDF Why Does My Transparent Glass Seem to Turn White' Bubbles affect light transmission in transparent kiln-glass. As a result' the more bubbles your glass contains (i.e.' the higher its…

Stained Glass

Ready to Make the World a Brighter Place' With the full range of Bullseye Glass' your palette of colorful possibilities is practically limitless. Download our Getting Started' Stained Glass PDF for a list of stained glass…

Bullseye Glass Color Conversion Chart

Bullseye Glass styles conveniently converted to CMYK and RGB color values to streamline your work flow and help you visualize your designs before you make a single cut. Download the Bullseye Glass Color Conversion Chart here (updated…

Quick Tip: Wet Scraping Kiln Shelves

    Scraping your kiln shelves is about to get faster' easier' and tidier with this handy wet method. It’s as simple as spray' scrape' and sweep (with or without gloves' depending on your druthers). Use this Quick Tip…

Quick Tip: Sparkle Sparkle

Create Hues with Sparkle and Depth Did you ever wonder why Bullseye doesn’t make an Aventurine version of other colors' like red' for example' We would if we could! The chemistry of those sparkles (a.k.a.' flake) is deeply…

Murakami SP-9500 Diazo Sensitizer Mixing Instructions

Overview Murakami's premier dual cure graphic emulsion. Outstanding resolution of fine details. An easy to use emulsion with wide latitude and exceptional durability. For instructions' download our Diazo Mixing Instructions…

Quick Tip: Color Line Dot Bowls

Make these sweet dotted bowls with Color Line Paints and the simplest of tools! To get started' layer two 4.75 ̋ circles of colorful 3mm sheet combinations and fire to a full fuse. For a slightly thinner' lighter bowl' swap the…

Quick Tip: On the Edge with Transparents

Transparents transform with on-edge strip construction Cut 3mm sheet glass into 1cm wide strips' turn those on edge' and—presto!—color saturation increases. In the pairings below' notice how the 1cm thick on-edge samples…

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New to using Bullseye Glass?

 "Your choice of glass is probably the most important decision you will make as a kilnformer." -Artist Steve Immerman on why he exclusively uses Bullseye. Bullseye glass is developed by artists, for artists. We've got your…

Is it safe to fire Bullseye Glass in a kiln?

Yes. At cold temperatures and typical firing temperatures, the colorants are encapsulated in the glass and the glass does not emit odors or toxics into the air. However, ventilation is recommended to dissipate odors from shelf…

What is The Rule of Halves?

This rule is important to know for successful glass cutting. A score is more likely to run properly when there are equal amounts of glass on either side of it. This is particularly important for cutting strips of…

Why should I choose Bullseye glass over other glasses?

When you buy Bullseye glass, you're investing in top-quality materials and technical resources: Our standards for testing and quality are the highest in the industry and our products are unsurpassed for consistency and…

How do I know which Bullseye clear glass to use?

Tekta is Bullseye's signature style of clear glass. Bullseye manufactures two styles of its Tekta glass: Tekta Clear and Tekta Crystal Clear. Tekta Crystal Clear is recommended for crystal clarity, especially in thicker works.…

Can I get samples of your glass?

Yes. Our popular sample sets for sheet glass, and billets are great resources for any studio. Note that these samples are for color reference only. They are not intended for reheating and may not be fusible.

Is there bubble-free glass?

Bubbles are found in all handcrafted glasses. They contribute to the art and beauty of finished glasswork. You can learn to minimize bubble formation or to create bubble patterns and effects by reading TechNotes 5: Volume &…

What are Special Production glasses?

Occasionally we produce limited runs of top grade glass styles that are not included in our regular product line. We refer to these as “Special Production” sheets. Special Production sheets may be one-of-a-kind or available in…

What are Curious glasses?

The grading system for our handmade glass demands that each sheet match a target color and have a uniform appearance to receive first-quality grade. Glass that is not quite the target color or that has some other…

Is all Bullseye glass recommended for fusing?

No, but all of our glass goes through a rigorous quality assessment and assigned a grade. Our top-quality sheet glass comes in two grades: Fusible and Standard (non-fusible). Fusible glass is coded as “F” and Standard or…

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